If you are sitting around with nothing to do you should consider greasing you caliper pins. EVERY caliper out there works on the same principle but not every caliper has pins like ours. If you have ever had a vehicle with a stuck caliper chances are you can prevent this by a quick lube of the caliper pins. http://i723.photobucket.com/albums/w...MVC-006S-1.jpg
If this does not fix it you can rebuild fairly easy but that is for another post. If you have not done this plan on it next time you have the wheel off, switching to summer rubber or any other type of work when the wheels are off.